How It Works

We'll bet you your BlackBerry that this super-slimming routine is so compact you'll fit it into your 9-to-5, no problem. "These moves will rev your calorie burn and trim all your trouble zones," says celebrity trainer Juliet Kaska, owner of Zen Fitness in Los Angeles, who created this speedy gym session for FITNESS from her Nooner workout classes. There's no waiting for strength machines and no losing time between sets — you tone certain muscles while other, just-worked ones recover. Bonus: The moves are core-centric, so no crunches are required. Still at your desk? Staying glued to your seat most of the day shuts off enzymes in your muscles that are responsible for fat burning, finds a study from the University of Missouri at Columbia. Flip through the plan, grab your gym bag, and go!

Start with one of Kaska's calorie-blasting cardio minis, then pick up a pair of 3- to 8-pound dumbbells and get to a workout area with a bench and a stability ball. Do the toning exercises in the order shown here. Try not to pause between sets — the rest time for each muscle is already built in.

Cardio in a Crunch

Hit the treadmill for a 10-minute interval pyramid to kick-start the fat burning and keep it humming. You'll alternate one minute at a steady pace with varying 1-minute bursts. (The plan also works for the elliptical or stairclimber.) Do the highest level you can: